<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <script>
        let obj = [
            {
                username: "张飞",
                gender: "男",
                salary: 55000
            },
            {
                username: "关羽",
                gender: "男",
                salary: 60000
            },
        ];
        // let arr = obj.map(function(item,idx){
        //     return item.salary+=2000
        // });
        let arr = obj.map(function(item,idx){
            return{...item,salary:item.salary+2000}
        })
        console.log(arr)
    </script>
</body>

</html>